On 01/30/2012 06:18 PM, Jan Kiszka wrote: > > > > This looks racy. The vcpu can remove its kvmclock concurrently with > > this access, and src will be NULL. > > There is no race here (src is member of the vcpu), but arch.time might > have become invalid. KVM_REQ_CLOCK_UPDATE instead of mark_page_dirty > would indeed be the way to go. Trivial solution, I would say. > > However, the concept of "guest stopped" has VM, not VCPU scope. We're not stopping the guest here, just setting a flag in kvmclock, which certainly is a per-vcpu thing. > That > makes the call more appropriate as a VM ioctl. If that thing should > really become per-vcpu, at least call it KVMCLOCK_VCPU_STOPPED. > All current ioctls start with KVM_. Maybe KVM_KVMCLOCK_CTRL? -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
